Appendicular Skeleton : Upper Limb MCQ - Practice Questions with Answers

• Each pectoral girdle consists of two bones: 1 clavicle and 1 scapula.
• The scapula is a large triangular flat bone situated in the dorsal part of the thorax between the second and seventh ribs.
• The dorsal, flat, triangular body of the scapula has a slightly elevated ridge called the spine which projects as a flat, expanded process called the acromion.
• The clavicle articulates with the acromion.
• Below the acromion is a depression called the glenoid cavity which articulates with the head of the humerus to form the shoulder joint.
• Each clavicle is a long slender bone with two curvatures. 
• This bone is commonly called the collarbone.

• Each Upper limb consists of the following 30 bones

1. ARM = 1 
2. FOREARM = 2
3. HAND = 27

• Wrist Bones = 8
• Palm Bones = 5
• Bones of Digits = 14

 1. ARM

• The humerus is the bone of the arm. 
• It is a long bone with the following features:
  • head, which articulates with the glenoid cavity of the scapula;
  • greater and lesser tubercles, which provide attachments for muscles that move the arm and shoulder
  • intertubercular groove, which holds a tendon from the biceps brachii, a muscle of the arm
  • capitulum, a lateral condyle that articulates with the head of the radius
  • trochlea, a spool-shaped condyle that articulates with the ulna

2. FOREARM

• The two bones of forearm are Radius and Ulna
• The radius is on the lateral side of the forearm (the thumb side).
• The radius has the following features: 
  • head, which articulates with the capitulum of the humerus and fits into the radial notch of the ulna; 
  • radial tuberosity, which serves as a place of attachment for a tendon from the biceps; 
  • ulnar notch, which articulates with the head of the ulna; 
  • styloid process, which serves as a place of attachment for ligaments that run to the wrist
• The ulna is the long bone of the forearm. 
• The ulna has the following features: 
  • coronoid process, which articulates with the coronoid fossa of the humerus when the elbow is flexed; 
  • trochlear notch, which articulates with the trochlea of the humerus at the elbow joint; 
  • radial notch, which articulates with the head of the radius. 
  • head, which articulates with the ulnar notch of the radius; 
  • styloid process, which serves as a place of attachment for ligaments that run to the wrist

3. HAND

• The Carpals are the bones of the wrist
• Each hand has 8 wrist bones arranged in two rows 
• The Carpals are Scaphoid, Lunate, Triquetrum, Pisiform, Trapezoid, Trapezium, Capitate, Hamate
• Metacarpals are bones of the Palm. These are 5 in each hand
• Phalanges are bones of digits.These are 14 in each hand